Transport Route Hazard Assessment for Post-Nankai Earthquake Reconstruction Support to Potential Areas of Isolation and Conservation of Cultural Heritage

四国担心南开地震会给该地区造成严重破坏，这场地震将在未来30-50年内袭击该地区。虽然海啸特别令人恐惧，但潜在的地质灾害也同样重要。不仅高知县和德岛平原沿海地区的液化和山区的山体滑坡，而且道路网络中断也预计会影响受灾地区人民的生活。如果现在发生南开地震，32号线的重建需要1个月以上的时间，33号线的重建预计需要几周，56号线和JR柳山线的重建时间还没有确定。这将导致高知县从陆地路线的角度被孤立。与此同时，偏远山区上的人类住区也将被孤立，四国零散的文化遗产地也将受到破坏。在此背景下，本研究对南开地震期间四国地区道路网络进行了危险性评价，并绘制了灾害危险性图。文化遗产遗址，特别是四国88朝圣地的地面动态，也在微震测量的帮助下进行了调查和阐明。

Shikoku fears heavy damage during the Nankai Earthquake, which is due to hit this region in next 30-50 years. Although tsunami is particularly feared of, the potentials of geo-disasters are equally important. Not only liquefaction of coastal areas in Kochi and Tokushima plains and landslides in mountainous areas, but discontinued road network is also expected to affect people's life in the disaster-hit areas. If the Nankai Earthquake takes place right at present, the reconstruction of Route 32 is supposed take more than one month, that of Route 33 is estimated at a few weeks, and that for Route 56 and JR Yosan Line is yet to be estimated. This will cause isolation of Kochi Prefecture from terrestrial-route perspectives. At the same time, human settlements over the remote mountains will also be isolated, and the scattered cultural heritage sites of Shikoku will also be damaged. All this in background, hazard assessment of the road network in Shikoku during the Nankai Earthquake has been made and hazard maps have been prepared in this study. The ground dynamics of the cultural heritages sites, particularly, the Shikoku 88-Pilgrimage Temples, has also been investigated and elucidated with the help of microtremor survey.